Musical stage adaptation of Hercules-I'm looking at you Disney! Make this happen! The opportunities would be crazy with puppets, projections, etc. I have studied Ancient Roman and Greek clothing (the borrowed gods and clothes from each other so why not combine them a bit) and would love to use my knowledge in a mythical/magical reinventing of their garments.
Shrek The Musical-again, magical! The texture you can put into this show would be so fun. I have always had a special little part of my heart for this musical and the endless possibilities a designer could have with it.
Rumors-this is a straight play by Neil Simon. When I was an actress I was in a production of this show. It is a hilarious comedy and allows for some decadence in styling the show as it takes place at a dinner party. As the characters descend into madness the costumes become more and more disheveled.
Mystery of Edwin Drood aka Drood-who doesn't like a musical that is improvised in the second act?! I designed this show as a paper project while working towards my MFA and my little sister was in a production of it many years ago. The show is fun and is actually a musical within a musical. Setting it in the Bustle Era would be even more fun. Think of the possibilities of the actor's undergarments before the show and the "run down" theatrical costumes one could create.
The Mousetrap-Agatha Christie is one of my favorite authors. I would also settle for Murder on the Orient Express. The late 40s/50's that Christie sets her plots in is a great time period to use actual vintage in the show or as inspiration. Working on a show that you love is always a joy as well! I'm always up for a good mystery.